Samuel g



4 S. G. GABELL. AIR PUMP FOR MARINE ALARMS.

No. 65,872 Patented June 1-8, 1867.

a .gnitrbg tatrs gaunt @ffitc? SAMUEL GnG ABELLp OF QUIHNCY, ILLIH'N-O-IS.

Letters Patent 1V9. 65,872, plated June 18, 186T. v i i l Bilge gidutulr rehash it in time Enters ateut ant muting part at the same.

TO ALL WHOM IT MAY CONCERN:

Be it known that'I, SAMUEL G. CA BELL, of Quincy, in Adams county, and State of Illinois, have invented certain new and useful improvements in Double-Acting Air-Pumps for Sounding Whistles or Trumpets for Marine Alarms, 82c. and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, through letters of'reference marked thereon, in which- Figure-1 represents a front view of my apparatus, partly in elevation and partly in section, as indicated by the red line a z, fig. 2.

Figure 2 is a transversc section taken on the line a: a: of figrl.

Figure .3 is an inverted view of the top of the cylindrical plunger, showing the valve.

The same letters of reference appearing on the several figures indicate like parts. a

The nature of my invention consists in the construction and application of a double-acting air-pump in comh ination with vacuum and pressure whistles or trumpets,'so as to produce continuous sounds by the rolling or pitching motion of-a vessel at sea, or by mechanical motor when necessary; also for light-houses or other like pur-poses. a v To enable others to construct and use my invention, I will describcits construction and operation as represented in the drawings, in whichv A represents the base on which my apparatus iserected; BB, two pillars supporting a cross-piece C, forming the entire framework. On the centre of the base A is erected a cylindrical air-chamber, D, which is p vi with induction pipes e at its bottom on .ther side, and an eduction pipe, f, near its upper end, which will be hereinafter more fully explained. On either side of this air-chamber D is arranged a pump, E, consisting of an inner and outer cylindcr, g h, the inner cylinder g communicating with the air-chamber D through the induction pipe e, which is provided with a valve, 2', similar to those of i an ordinary pump. The plungers F, or reciprocating portions of these pumps, each consistsof a cylinder, is, open at its lower end, of suitable size to pass freely within the annular space formed between the cylinders g h, and is provided with a central rod, Z, constructed in such form as to admit of a free passage of air between it and the cylinder g, and at the same time to serve us a guide to insure a parallel motion to said plunger. The upper end of the cylinder 7: is enclosed by; a cap, m, to which is attached a central rod, *n, to which further allusion will be made hereinafter. On one side" of this rod'n is an aperture in the cap m, in which is fitted a tube, 10, parallel with and secured to the'rod n. The lower end of this tube is provided with a downwardly-opening valve, 9, and on its upper end is mounted a whistle, G, of similar construction to the ordinary steam whistle, except that its induction passages are so arranged that the sound shall be produced by vacuum, or the admission of air from without, instead of by blast from within, the air passing in the direction of the red arrow in fig. 1. The upper end of this induction passage of the whistle is capped with a perforated cup, 0, inverted over it, the perforations in which are so located that the spray dashing over the vessel cannot enter to obstruct the sound of the whistle. The eduction pipe f-of the air-chanibenD is provided with a stop-cock, H, surmounted by a blast whistle, I, of. ordinary construction.-

The apparatus is operated by means of a rock-shaft, r, to which is attached a beam, 8, carrying two sectors t, which gear into the racks a, forming an extension of the rod n of the plungers, which receive areciprocating motion therefrom by the vibration of the lever 11, which may be weighted at its lower end, forming'a pendulum so. as to be operated with regard to the cylinders by the rolling or pitching motion of the vessel, or by any suitable'mechanioal means.

The cylinders g 71. k be made of iron, and the annular space between the cylinders g k filled with mercury or other suitable'flui'd, to the level indicated by the red line w, and which acts as a packing to the reciprocating cylinders In.

I The operation will then be as follows: When the vessel is rolling, the apparatus is placed transversely on deck, and when pitching in line with the keelson; in either case the lever or pendulum 1) will maintain its vertical position, whilst the whole apparatus will have a vibrating motion with regard to it, caused by the motion of the vessel, which will produce a reciprocating motion of the plunger F, through the sectors t and racks u, by which, in the downward motion of the plungers F, air will be forced into the chamber D to sound the whistle I, and in the upward motion, the vacuum being formed in the cylinders 7: y, will be supplied byair entering through the whistle G, thus keeping the whistle I and one of those marked G constantly sounding for communicating an alarm through fog to other vessels in the vicinity.

At times, when there may not be suflieient motion in the 'vessel to efi'eot this oneration, the lever vimay be vibrated by any suitable mechanism, or by hand. I This apparatus, when used for lightdmuses, is made stationarv. and the lever 21 operated by any suitable motor to produce its vibrating motion.

This construction of air-pump may be applied for blast-furnaces or any other like purposes. Having thus described my invention, what I claim as new, and desire to secure by Letterslatent, is The double-acting air-pump, constructed substantially as described, and charged with a dense fluid packing, in combination with the draught and blast whistles G I, substantially as and for the purpose set forth.

S. G. OABELL. Witnesses J. G. FosTnn, W. Momus SMITH. 

